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-rw-r--r--arch/powerpc/platforms/iseries/lpevents.c341
1 files changed, 0 insertions, 341 deletions
diff --git a/arch/powerpc/platforms/iseries/lpevents.c b/arch/powerpc/platforms/iseries/lpevents.c
deleted file mode 100644
index 202e22798d30..000000000000
--- a/arch/powerpc/platforms/iseries/lpevents.c
+++ /dev/null
@@ -1,341 +0,0 @@
-/*
- * Copyright (C) 2001 Mike Corrigan IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/bootmem.h>
-#include <linux/seq_file.h>
-#include <linux/proc_fs.h>
-#include <linux/export.h>
-
-#include <asm/system.h>
-#include <asm/paca.h>
-#include <asm/firmware.h>
-#include <asm/iseries/it_lp_queue.h>
-#include <asm/iseries/hv_lp_event.h>
-#include <asm/iseries/hv_call_event.h>
-#include "it_lp_naca.h"
-
-/*
- * The LpQueue is used to pass event data from the hypervisor to
- * the partition. This is where I/O interrupt events are communicated.
- *
- * It is written to by the hypervisor so cannot end up in the BSS.
- */
-struct hvlpevent_queue hvlpevent_queue __attribute__((__section__(".data")));
-
-DEFINE_PER_CPU(unsigned long[HvLpEvent_Type_NumTypes], hvlpevent_counts);
-
-static char *event_types[HvLpEvent_Type_NumTypes] = {
- "Hypervisor",
- "Machine Facilities",
- "Session Manager",
- "SPD I/O",
- "Virtual Bus",
- "PCI I/O",
- "RIO I/O",
- "Virtual Lan",
- "Virtual I/O"
-};
-
-/* Array of LpEvent handler functions */
-static LpEventHandler lpEventHandler[HvLpEvent_Type_NumTypes];
-static unsigned lpEventHandlerPaths[HvLpEvent_Type_NumTypes];
-
-static struct HvLpEvent * get_next_hvlpevent(void)
-{
- struct HvLpEvent * event;
- event = (struct HvLpEvent *)hvlpevent_queue.hq_current_event;
-
- if (hvlpevent_is_valid(event)) {
- /* rmb() needed only for weakly consistent machines (regatta) */
- rmb();
- /* Set pointer to next potential event */
- hvlpevent_queue.hq_current_event += ((event->xSizeMinus1 +
- IT_LP_EVENT_ALIGN) / IT_LP_EVENT_ALIGN) *
- IT_LP_EVENT_ALIGN;
-
- /* Wrap to beginning if no room at end */
- if (hvlpevent_queue.hq_current_event >
- hvlpevent_queue.hq_last_event) {
- hvlpevent_queue.hq_current_event =
- hvlpevent_queue.hq_event_stack;
- }
- } else {
- event = NULL;
- }
-
- return event;
-}
-
-static unsigned long spread_lpevents = NR_CPUS;
-
-int hvlpevent_is_pending(void)
-{
- struct HvLpEvent *next_event;
-
- if (smp_processor_id() >= spread_lpevents)
- return 0;
-
- next_event = (struct HvLpEvent *)hvlpevent_queue.hq_current_event;
-
- return hvlpevent_is_valid(next_event) ||
- hvlpevent_queue.hq_overflow_pending;
-}
-
-static void hvlpevent_clear_valid(struct HvLpEvent * event)
-{
- /* Tell the Hypervisor that we're done with this event.
- * Also clear bits within this event that might look like valid bits.
- * ie. on 64-byte boundaries.
- */
- struct HvLpEvent *tmp;
- unsigned extra = ((event->xSizeMinus1 + IT_LP_EVENT_ALIGN) /
- IT_LP_EVENT_ALIGN) - 1;
-
- switch (extra) {
- case 3:
- tmp = (struct HvLpEvent*)((char*)event + 3 * IT_LP_EVENT_ALIGN);
- hvlpevent_invalidate(tmp);
- case 2:
- tmp = (struct HvLpEvent*)((char*)event + 2 * IT_LP_EVENT_ALIGN);
- hvlpevent_invalidate(tmp);
- case 1:
- tmp = (struct HvLpEvent*)((char*)event + 1 * IT_LP_EVENT_ALIGN);
- hvlpevent_invalidate(tmp);
- }
-
- mb();
-
- hvlpevent_invalidate(event);
-}
-
-void process_hvlpevents(void)
-{
- struct HvLpEvent * event;
-
- restart:
- /* If we have recursed, just return */
- if (!spin_trylock(&hvlpevent_queue.hq_lock))
- return;
-
- for (;;) {
- event = get_next_hvlpevent();
- if (event) {
- /* Call appropriate handler here, passing
- * a pointer to the LpEvent. The handler
- * must make a copy of the LpEvent if it
- * needs it in a bottom half. (perhaps for
- * an ACK)
- *
- * Handlers are responsible for ACK processing
- *
- * The Hypervisor guarantees that LpEvents will
- * only be delivered with types that we have
- * registered for, so no type check is necessary
- * here!
- */
- if (event->xType < HvLpEvent_Type_NumTypes)
- __get_cpu_var(hvlpevent_counts)[event->xType]++;
- if (event->xType < HvLpEvent_Type_NumTypes &&
- lpEventHandler[event->xType])
- lpEventHandler[event->xType](event);
- else {
- u8 type = event->xType;
-
- /*
- * Don't printk in the spinlock as printk
- * may require ack events form the HV to send
- * any characters there.
- */
- hvlpevent_clear_valid(event);
- spin_unlock(&hvlpevent_queue.hq_lock);
- printk(KERN_INFO
- "Unexpected Lp Event type=%d\n", type);
- goto restart;
- }
-
- hvlpevent_clear_valid(event);
- } else if (hvlpevent_queue.hq_overflow_pending)
- /*
- * No more valid events. If overflow events are
- * pending process them
- */
- HvCallEvent_getOverflowLpEvents(hvlpevent_queue.hq_index);
- else
- break;
- }
-
- spin_unlock(&hvlpevent_queue.hq_lock);
-}
-
-static int set_spread_lpevents(char *str)
-{
- unsigned long val = simple_strtoul(str, NULL, 0);
-
- /*
- * The parameter is the number of processors to share in processing
- * lp events.
- */
- if (( val > 0) && (val <= NR_CPUS)) {
- spread_lpevents = val;
- printk("lpevent processing spread over %ld processors\n", val);
- } else {
- printk("invalid spread_lpevents %ld\n", val);
- }
-
- return 1;
-}
-__setup("spread_lpevents=", set_spread_lpevents);
-
-void __init setup_hvlpevent_queue(void)
-{
- void *eventStack;
-
- spin_lock_init(&hvlpevent_queue.hq_lock);
-
- /* Allocate a page for the Event Stack. */
- eventStack = alloc_bootmem_pages(IT_LP_EVENT_STACK_SIZE);
- memset(eventStack, 0, IT_LP_EVENT_STACK_SIZE);
-
- /* Invoke the hypervisor to initialize the event stack */
- HvCallEvent_setLpEventStack(0, eventStack, IT_LP_EVENT_STACK_SIZE);
-
- hvlpevent_queue.hq_event_stack = eventStack;
- hvlpevent_queue.hq_current_event = eventStack;
- hvlpevent_queue.hq_last_event = (char *)eventStack +
- (IT_LP_EVENT_STACK_SIZE - IT_LP_EVENT_MAX_SIZE);
- hvlpevent_queue.hq_index = 0;
-}
-
-/* Register a handler for an LpEvent type */
-int HvLpEvent_registerHandler(HvLpEvent_Type eventType, LpEventHandler handler)
-{
- if (eventType < HvLpEvent_Type_NumTypes) {
- lpEventHandler[eventType] = handler;
- return 0;
- }
- return 1;
-}
-EXPORT_SYMBOL(HvLpEvent_registerHandler);
-
-int HvLpEvent_unregisterHandler(HvLpEvent_Type eventType)
-{
- might_sleep();
-
- if (eventType < HvLpEvent_Type_NumTypes) {
- if (!lpEventHandlerPaths[eventType]) {
- lpEventHandler[eventType] = NULL;
- /*
- * We now sleep until all other CPUs have scheduled.
- * This ensures that the deletion is seen by all
- * other CPUs, and that the deleted handler isn't
- * still running on another CPU when we return.
- */
- synchronize_sched();
- return 0;
- }
- }
- return 1;
-}
-EXPORT_SYMBOL(HvLpEvent_unregisterHandler);
-
-/*
- * lpIndex is the partition index of the target partition.
- * needed only for VirtualIo, VirtualLan and SessionMgr. Zero
- * indicates to use our partition index - for the other types.
- */
-int HvLpEvent_openPath(HvLpEvent_Type eventType, HvLpIndex lpIndex)
-{
- if ((eventType < HvLpEvent_Type_NumTypes) &&
- lpEventHandler[eventType]) {
- if (lpIndex == 0)
- lpIndex = itLpNaca.xLpIndex;
- HvCallEvent_openLpEventPath(lpIndex, eventType);
- ++lpEventHandlerPaths[eventType];
- return 0;
- }
- return 1;
-}
-
-int HvLpEvent_closePath(HvLpEvent_Type eventType, HvLpIndex lpIndex)
-{
- if ((eventType < HvLpEvent_Type_NumTypes) &&
- lpEventHandler[eventType] &&
- lpEventHandlerPaths[eventType]) {
- if (lpIndex == 0)
- lpIndex = itLpNaca.xLpIndex;
- HvCallEvent_closeLpEventPath(lpIndex, eventType);
- --lpEventHandlerPaths[eventType];
- return 0;
- }
- return 1;
-}
-
-static int proc_lpevents_show(struct seq_file *m, void *v)
-{
- int cpu, i;
- unsigned long sum;
- static unsigned long cpu_totals[NR_CPUS];
-
- /* FIXME: do we care that there's no locking here? */
- sum = 0;
- for_each_online_cpu(cpu) {
- cpu_totals[cpu] = 0;
- for (i = 0; i < HvLpEvent_Type_NumTypes; i++) {
- cpu_totals[cpu] += per_cpu(hvlpevent_counts, cpu)[i];
- }
- sum += cpu_totals[cpu];
- }
-
- seq_printf(m, "LpEventQueue 0\n");
- seq_printf(m, " events processed:\t%lu\n", sum);
-
- for (i = 0; i < HvLpEvent_Type_NumTypes; ++i) {
- sum = 0;
- for_each_online_cpu(cpu) {
- sum += per_cpu(hvlpevent_counts, cpu)[i];
- }
-
- seq_printf(m, " %-20s %10lu\n", event_types[i], sum);
- }
-
- seq_printf(m, "\n events processed by processor:\n");
-
- for_each_online_cpu(cpu) {
- seq_printf(m, " CPU%02d %10lu\n", cpu, cpu_totals[cpu]);
- }
-
- return 0;
-}
-
-static int proc_lpevents_open(struct inode *inode, struct file *file)
-{
- return single_open(file, proc_lpevents_show, NULL);
-}
-
-static const struct file_operations proc_lpevents_operations = {
- .open = proc_lpevents_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int __init proc_lpevents_init(void)
-{
- if (!firmware_has_feature(FW_FEATURE_ISERIES))
- return 0;
-
- proc_create("iSeries/lpevents", S_IFREG|S_IRUGO, NULL,
- &proc_lpevents_operations);
- return 0;
-}
-__initcall(proc_lpevents_init);
-